Drawcut scissors



Feb. 16 1926.

H. FEDDERSEN d DRAW CUT SCISSORS Filed Sept. 30

Rio S. my no NE NI E R 2u VM m3 mf m m Patented Feb.. 16, 1926..

ion-iran STATES HENRY L. FEDDERSEN, DF SAN FRANCISCO, CALIFORNIA.

IDRAWCUT SCISSORS.

Application filed September 30, 1924. Serial No.' 740,853.

lll-special joint construction which will impart a relative longitudinalmotion to the blades' during the cut-ting action whereby a draw cut iseffected with a resulting increased efficiency in such devices.

In the drawings hereto Figure 1 shows a pair of scissors with bladeshalf opened and with the pivot nut'and washer removed to reveal thepeculiar construction v of the pivot which produces the draw cut action.

Figure 2 isa section of the joint taken along the` line 2-2 of Figure 1.V

Figure 3 is the' joint as shown in Figure 1, but with the blades closedand with the near blade drawn to the end of'its Slot which permits ofthe draw cut action.

Figure 4 shows a modified joint providing for agreater sliding or drawcut ac-l tion than the construction shown in Figure 1. l 0 u Figures."5y and 6 show the same joint as do the other figures but with asliding block over the pin to prevent wear.

',In the figures 1 is the upper blade, 2 the lower blade, and 3 and 4`are the respective handles of the blades.

At 5 is a pivotfpin for' holding the bladcs together and 'permitting'their pivotal action. i

This pin has an enlarged portion 6 and two reduced ends, the outer 'onebeing threaded as shown inFigure 2 and the other one being passedthrough blade-2 andv firmly rivertcd thereto by heading over as shown atAt 8 is a notch formed in the edge of the rivet hole so that thespreading of the rivet will lock therein as indicated so lthat theriveted pinwill be securely locked against turning,

Blade 1 fits a ainst blade 2 over this iin, but instead of aving a plainround pivot hole is slotted as shown at 9 and the slot is formed with a`gear tooth notch 1() on one side receiving freely a single gear tooth 11which projects from the enlarged portion 6 of the pin.

The position of this gear tooth in relation to the blade to which thepin is riveted is predetermined and is suclr that when the scissorsblades are about halfopen, as shown in Figure 1, the tooth will projectat right angles to the run of the slot in blade 1, and when the bladesare closed will be in the position shown in Figure 3 drawing the bladeto the end of the slot.

By this arrangement it is manifest that upon opening and closing of thescissors, blade 1 will be moved longitudinally back and forth relativeto blade 2, thus effecting a draw cut action.

The amount of the draw cut motion is governed by the distance of thetooth 1l outwardly from the center of the pin, and if this is maderelatively great several small teeth may be used in'place of the singletooth as indicated in Figure 4 of the drawings, where the tooth 11 ofFigure 1 is replaced by a small gear segment having several small teeth11 thereon and meshing with similar teeth 10 formed on the side of the sot.

In contemplating the pivotal joint as described it will be seen that thepin 5 is liable to wear en account of its rubbing along the edge ofthe-slot in blade 1 and to overcome this I optionally reduce the heightof the shoulder portion 6 of the pin and drop over the pin a plate 14free to revolve on the pin and free to slide in the slot so that a longsurface is presented to both edges of the slot, wear is'thus preventedand no backlash is developed through long use.

It is evident without illustration that a roller may be used in place ofthe sliding plate but the plate is simple and has longer life. f

Having thus described my invention, it will be seen to effect thedesired objective in a very simple manner having the outward appearanceof an ordinary scissors, for when in use a washer 12 covers the slot anda nut 13 provides' for adjustment of the blades to a proper workingfriction.

I claim:

1. A pair of scissors or shears comprising two blades pivotally andslidably secured together, the pivotal connection comprising a.shouldered pin secured fixedlv to one of the blades with the shoulderprojecting into a slot in the other blade, a projection from the.shouldered portion of the pin engaging a notch in the edge of the slot,a threaded reduced portion of the pin extending through the slottedblade and having a nut thereon for securing the joint, and a platethrough which said pin passes, said plate being free to rotate on thepinand to slide in the slot.

2. A pair of scissors or shears comprising two blades pivotally andslidably secured together, the pivotal connection comprising ashouldered pin secured lixedly to one of the blades with Ythe shoulderprojecting into a slot in the other blade, a projection from theshouldered portion of the pinI engaging a notch in the edge of the slot,a threaded re duced portion of the pin extending through the slottedblade and having a nut thereon for securing the joint, and a platethrough which said pin passes, said plate being free to rotate on thepin and to slide in the slot, the head end of said pin being riveted andextended into a notch in one of the blades to prevent it from rotating.

HENRY L. FEDDERSEN.

